Regulator.



' W. S. HADAWAY, im

amm/noa.

MPLICA`IION FILED MAR.2G. i914.

Patented Got. 92, 1918,

2 SHEETS-SHEET l.

/NVENTR w. s. HAnAwAY,1.

REGULATOR.

APPLICATION FILED MAR. 2E. L914.

1,282,221. Patented oct.22,1918.

2 SHEETS-SHEET 2.

/NVEN TOI? ffmm UNITED sTATEs PATENT oEErcE.

A`WILLIIAM Sl HADAWAY, JR., OF NEW ROCHELLE, NEW YORK, ASSIGNOR TO THE CUTLER-HAMMER MFG. C0., F MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

REGULATOR.

Specification-of Letters Patent.

Patented Oct. 2.2, 1918.

Application led March 26, 1914. Serial No. 827,362.

To all lwhom t may concern l Be it known that I, WILLiAM S. HADA- WAY, Jr., a citizen of the United States, and a resident of New Rochelle, county of Westchester, and State of New York, have invented certain new and useful Improvements in Regulators, of which the following is a specification, reference being had to the acregulated temperature corresponding thereto.

, compact regulatorof the aforesaid charac! Another object is to provide a simple and ter that shall be effective and ieliable in op.- eration and particularly adapted to govern the circuit from. which energy issupplied to an electric heating device.

Another object is to provide a combination embodying an actuator, a movable contact having a movement between predetermined limits, and means for permitting the actuator to overrun in either direction of movement without injuring the Contact.

Other objects and advantages. of my invention will be set forth hereinafter, and-inorder that my invention may be thoroughly understood I will proceed to describe .the

same in the following specification and then point out the novel features thereof in appended claims.

Referring to the drawings: p Figure 1 is a front elevation with the cover removed of a regulator arranged and constructed in accordance with my invention.

Fig. 2 is a partially sectional elevation at right angles to Fig. 1.

A detail plan view of the cooperating contact, members is shown on a larger scale in Fig. 3.

Figs. 4y and 5 are respectively side and front elevations of the movable Contact member with its attachments, the scale to which they Fig. 3.

Figs. G and 7 are respectively a front and side elevation of the spiral actuator which forms a part of the structure of Figs. land 2. Corresponding parts are desi nated by the same reference characters in all the figures. While I have indicated a use for which my improved regulator is well adapted, my linvention is not limited in this regard and the device is ca able of wide application.

In general, tlie structure illustrated" com-l prises a casing 10, a frame 20 relatively sta tionary contacts 30, a movaI le contact -50, spring pressed arms 60, a pressure responsive spiral actuator 0, a swivel supporting plate 7 5 for the actuator and a thermometer 80.

The casing l() is in the form of a box having lugs 11 projecting inwardly from its bottom surface, and a cover 12 removably vsecured to it by screws 13. The cover is preferably provided with an opening '14 closed by a glass plate 15. The body of the boX- has a small lateral opening 16 'through which a connecting tu'be of the thermometer extends.

The frame 20 is mounted on the casing lugs 11 and it is secured thereto 'by screws 21. It has at the top a hollow boss 22, and extending longitudinally through its center a slot 23. Near its lower end it is provided with a transverse slot 24 which is at right angles to the slot 23, and it has, at the respcctive :ends of the Aslot 24, upturned edges or ears 25. I-t may be conveniently stamped or punched from sheet metal.

Parallel to the slot 24 and extending between and supported by the ears 25 is a pin 26 and rotatively supported in parallelism with the pin is an adjusting screw 27. Oppos'ite'the head of the screw 27, which is slotted to receive a screw-driver, is an opening 18 in the casing in order to permit the adjustment of the screw without removing Athe frame from the casing. l The stationary Contact members 30 are in the form of thumb screws which are insorted in tapped holes in a pair of Contact posts 31. These posts are secured to and in sulated from a carrier 32 which extends into the slot 24 in the fra-111e and is mounted to be adjusted longitudinally of the pin 2G by the screw 27 The carrier is tapped to receive the screw and is provided with a parallel are drawn corresponding to that of hole to receive the pin 26 both of/wliicli extend through it. The posts are spaced apart on' the carrier and extend outwardly therefrom in the plane determined by the axes of the pin and screw. The holes which receive the screw contacts 30 are in alinement with each other in the same plane and the screws may be locked in any position to which they are adjusted, by set screws 33. The posts are provided with terminal extensions 34 to which circuit conductors (not showin) may be connected in a well-known manner. The mounting for tlie carrier is obviously suoli that it is readily adjustable transversely of lthe regulator and, as more fully explained hereinafter, the contacts 30 may be set at a predetermined distance apart and then the carrier adjusted to determine their position relative to the movable contact. An index or pointer of the carrier is adapted to coperate with va transverse scale strip 36 which is secured to the flanges 25 adjacent to the path ofy movement of the carrier.

A stationary post 51 extends outwardly from the boss 22 to which it is secured by a screw 52 and from which it is electrically separated 'by insulation 53. Rotatively mounted on the post near its outer end is a hub 56 which carries a pair of spaced brackets 54:. The brackets 54 support pins 55 in parallelism with the post 51. A strip or lfinger 57 is secured to the hub 56 and carries at its lower end a contact 50. The l'iub 56 has a projection 58 which is in alinement with the finger 57 but extends upwardly from the hub between the pins 55 v which are above the center line of the post 51,

The arms 60 are similar to each other and each of them has a pair of spaced hub members 61 which, are fitted onto one of the pins 55 and provides a rotatable mounting for the arm. Each arm is materially wider than the finger 57 so that there is a free space between the arms beneath the finger. Between the spaced liubs'6l on each of the pins 55 is ahe'lical spring 62 which is under tension and has one end in engagement with the extension 58 of the hub 56 and the other end 64.- in engagement with the arm which is mounted on the same pin. The arrangement of parts is such that the two springs 62 which are located on the respective pins press the arms 60 against the finger 57.- The outer ends of the arms are bent inwardly as shown at 65 so that they are in engagement with t-he finger 57 only-'at one point which is substantially midway between its 'pivotal axis and the contact 50. Sincethe arms 60 are mounted on the `rliub 56 of tlie finger against which they are pressed, they constitute yield'ingimembers thereof. They are provided for the purpose of permitting a wide movement of the .,actuator Without injuring the finger which is clearly limited in its movement by the stationary contacts 30. l

The actuator 70, as clearly shown in Fig. 6, is similar in structure to the corresponding part of a pressure gage, being composed of a flattened tube which is bent into the form of a spiral. Connected toits inner end is a tube 71whicli is preferably provided with an opening of capillary dimensions.

v The `spii'al is closed at its outer end and has an enlargement or head 72. An actuating pin 73 is insulated from and mechanically connected to the head 72 and extends outwardly at right angles to the plane of the spiral, as clearly shown in Fig. 2. To the outer end or" the pin 73 is secured a roller 74 which is adapted to engage and act upon the one o r ,the other of the arms 60.

The spiral actuator is supported at its inner end by a plate 76 which is in turn secured to and forms a part of the swivel supporting plate 75. The swivel plate is in the form of a disk segment and has a circumferential slot 77 and a hole 78 at its center of curvature.

A strip 28 is located on the underside of the frame 2O beneath the longitudinal Slot 23 and the swivel supporting plate 75 is adjustably mounted onthe frame by screws A29 which respectively vextend through the slot 77 and the hole 78 and engage suitably spaced tapped holes iii the strip 28.

The member 80 which, for convenience is designated as a thermometer, comprises a tubular body which is connected to the flattened tube of the spiral actuator by the tube 71. These connected members are preferably sealed by welding after having been lled with an expandible liquid such as mercury. The tube 7l is relatively flexible and made of any required length, the thermometer 80 being subjected to the temperature to be regulated; for example, the thermometer may be'introduced into a Crucible for a typesetting machine for the purpose of regulating the heat generated in the crucible heati ers. A crucible and suitable heaters theretor. which may be conveniently govei'iied by my regulator, are sliowii and described iii my copending application Serial Numberv 827,361, filed ot' even date herewith. y

The operation of the regulator is as follows: Assuming that the normal temperature to be maintained by the regulator and to which the 4thermometer 80 is exposed is 530 degrees F., the parts ofthe regulator will occupy positions iii which they are shown in Fig. 1 when the thermometer 80 is heated exactly to 530 degrees. Should the temperature of the thermometer be increased the spiral actuator 70will be expanded and since its inner end is rigidly afiixed tothe frame 2Q ,its outerY end will move in a clockwise direction with respect to Fig. l, and the roller 74 of the actuating pin 'T3-will act and the finger 57- will not be subjected,

to excessive stresses which might otherwise destroy it or bend it sufficiently to destroy 4the accuracy of the instrument. A

circuit (not shown) maybe completed by these contacts in a well known manner and cause a reduction of the heat to which the thermometer is subjected. If, for example, theiregulator governs anpelectric heater the circuit of the heater may be temporarily interrupted.

Wheny the ten'iperature is restored to 530 degrees which was assumed as a normal temperature, the parts will return to the positions in which they are shown in Fig. l.

If, on the other hand, the temperature to which the thermometer is subjected falls bel`ow 530 degrees, the spiral actuator will be contracted, the roller 74 of the actuating pin being moved in a counter-clockwise direction. It now acts upon the opposite arm 60, and forces the movable Contact 50 into engagement with the other stationary contact 30. A circuit may now be established which is adapted to increase the heat to which the v thermometer is subjected. In case the regulator is governing an electric heater the supply circuit of the heater'may be closed.

Of course, some means is preferably provided for substantially maintaining the del sired temperature an an auxiliarylheating device energized and denergized by the regulator. Inasmucli as arrangements of this character form no part ofA my present lator.

invention which .is concerned only with the regulator, I deem i t unnecessary to illustrate or describe the devices governed by the regu- When the flattened spiral actuator' 70 is inactive, the thermometer being at ordinary room temperature, it is contracted as shown in Fig. 6, the actuating head 72 being materially displaced from the central radius of the sector 75. Under these conditions it is evident that the arm 6(4), to the left in Fig. 1, will be displaced from the position in which it is illustrated by a material angle,

4this means the head 72 Aand the pin 73 may -be adjusted to act upon the arm 60 at a greater or less distance from their pivotal centers. This adjustment will affect to a certain extent the sensitiveness of the regulater because'by this means the deviation of the head necessary to permit engagement between the movable contact and one of the stationary contacts is varied. Since the carrying sector 7 5 is rotatively adjustable, the spiral actuator may be set without difficulty when inactive, to such a position as to bring the head into the central plane of the regulater at the predetermined normal temperl ature.

lFurthermore, a very careful adjustment may be eilected between the two stationary contacts 3Q to secure 'the desired. spacing. Then by means of the screw 27 the position of the carrier 32 may be carefully adjusted transversely of the regulator so that contact will be eiiectcd with one or the other of the stationary members by the movable contact in response to corresponding and equal but opposite variations in the temperature, to which the thermometer is subjected.

It is evident that the frame, to which all the active parts ot the device are attached, is readily removable from the casing b merely releasing the screws 21.` While the casing protects the apparatus from injury and dust the position of the movable contact and the setting of the carrier 32 with reference to the scale 86, may be observed through the glass plate 15.

Variations in 'size and arrangement of details may obviously be effectedv within the tion, two yielding arms on said movable member, and means acting upon one or the other of the arms to actuate the movable member in either direction, whereby said last named means is free to move through a greater range than said movable member.

2. A regulator comprising stationary contacts, a movable contact adapted to swing between and into engagement With the stationary contacts, yielding arms on said movable contact, and means acting upon one or the other of the yielding arms to actuate the movable contact into engagement with one or the other ofthe respective stationary contacts.

3. A regulator comprising pair of stationary contacts, amovable contact pivotally supported and adapted to swing between and into engagement -witli the stationary contacts.l a pair of arms pivotally mounted on the movable contact, springs pressing the arms against the contact, and means acting upon the arms to actuate the movable contact.

4. A regulator comprising-a casing, a'

frame removably secured therein, a post secured to and insulated trom the trame near one end, a movable Contact pivotally mountactuator rotatively and longitudinally ad justable on said frame.

5. A regulator comprising a casing, a frame removably secured therein, a post secured to and insulated from the frame near one end, a movable contact pivotally mounted on said post, a pair of spring-pressed arms mounted upon and pressing against the movable contact, a pair of independently adjustable stationary contacts adapted to cooperate with the movable contact, a carrier for the 'stationary contacts adjustably mounted on said trame, a flattened tube spiral actuator arranged to act upon the one or the other of said arms, a sector aiiXed to 'he inner end of said spiral and having a c'rcularly curved slot, and means for adju.tably securing the sector to said frame to p irmit a rotative and a straight line adjustment thereof.

6. A reg:` .lator comprising a casing, a frame removably secured therein, a movable contact pivotally supported by said frame, a pair of spring-pressed arms mounted upon the movable Contact, a pair of independently adjustable stationary contacts adapted tocooperate with the movable Contact, a carrier for the stationary contacts adjustably mounted on said frame, a temperature responsive actuator arranged to act upon the one or the other of said arms, and a carrier for the actuator rotatively and longitudinally adjustable on said frame.

7. A regulator comprising a movable contact, a paii` of spring-pressed arms acting upon opposite sides of the movable contact, a pair of independently adjustable station ary contacts adapted to cooperate with the movable contact, and a temperature responsive actuator adapted to act upon the one or the other ot' said arms. l

S. A regulator comprising a movable contact, a pair of spring-pressed arms acting upon opposite sides oi' the movable contact, a pair of stationary contacts adapted to cooperate with the movable contact, an adjustably supported carrier therefor, and a temperature responsive actuator arranged .to act upon the one or the other of said arms.

9. A regulator comprising a movable contact, a pair of s ring-pressed arms acting vupon opposite sic es of the movable contact,

a pair of stationarv contacts adapted to cooperate with the movable contact, and means adapted to act upon the one or the other of said arms to actua-te the movable Contact.

10. A regulator comprising a movable contact, a pair of spring-pressed arms acting upon opposite sides of the movable contact, a stationary contact adapted to 'coper-v -ing arms mounted on the movable member,

and a temperature responsive spiral having an actuating member adapted to act upon one or the other of said yielding arms when the spiral is expanded or contracted.

13. The combination with a movable contact adapted to swing in one direction or the other into engagement with a stationary contact, having a pair of opposed yielding members, of a temperature responsive spiral having an actuator projection adapted to act upon one or the other of said yielding members when the spiral is expanded and contracted from a mean position correspond-l ing to a predetermined temperature.

114C. A regulator comprising a pairof stops or limits7 a movable member adapted to swing between said stops or limits and having a pair of outwardly yielding parts, each of said parts being adapted when moved outwardly to transmit motion to said member until it abuts against one of said stops or limits and then to yield outwardly, and an actuator having a projection extending between said parts and adapted to move the movable member between said limits in respouse to its own movement, without being restricted by said limits in either direction.

15. A regulator comprising a pair of spaced stationary contacts, a movable contact member adapted to swing between said stationary contacts and having a pair of outwardly yielding parts, each of said parts being adapted when moved outwardlyv to transmit motion to said member until it abuts against one of said contact-s and then to yield outwardly, and an actuator having a projection extending between said parts and adapted to move the movable member between said lmits in response to its own having a movement, without being restrifted by said limits in either direction.

16. A regulator comprising a pair of spaced stationary contacts, a mqvable contact member adapted to be swung between saidstationary contacts and having a pair of outwardly yielding parts, each of said parts being adapted when moved outwardly to transmit motion to said member until it abut-s against `one of said contacts and then to yield outwardly, and an actuator having a projection extending between said parts and adapted to move the movable Contact member` between said stationary contacts in response to its own movement, Without being restricted by said contacts in either directionl?. A regulator comprising a pair of stationary contacts, a pivoted contact arm adapted to swing between said contacts and pair of outwardly yielding fingers, each of said lingers being adapted when moved outwardly to transmit motion to said member until `it abuts against one of said contacts and then to yield outwardly, and an actuator having a projection extending be` tween said lingers and adapted to move the Contact arm between and into engagement with said contacts in response to its own movement without being restricted in either direction by said contacts.

18. A regulator comprising a frame, a movable contact pivotally mounted thereon, a pair of independently adjustable stationary contacts adapted to cooperate with thel i movable contact, a carrier for the-stationary contacts adjustably mounted on the frame, a temperature responsive actuator for the movable contact, and a carrier for the actua`v tor rot-atively on said frame.

19. A regulator comprising a casing, a frame removably secured therein, a movable contact pivotally mounted on the frame, a pair of independently adjustable stationary contacts adapted to coperat-e with the movable contact, a carrier for the stationary contacts adjustably mounted on the frame, a flattened tube spiral actuator for the movable contact, a sector alixed to the inner end of'said spiral, and means for adjustably securing the sector to the frame to ermit a rotative and a straight line adjustment thereof.

v2,0. A regulator comprising a movable con` tact having a pair of oppositely yielding parts, a pair of independentlyadjustable stationary contacts adapted to coperate with the movable contact, and an actuator extendand longitudinally adjustable ing between and actingupon one or the other of said partsv to determine the position of the movable contact between the stationary contacts, without being limited in either direction by said contacts.

In witness whereof, I have hereunto set my hand this 24 day of March, 1914, in the presence of two subscribing witnesses.

WILLIAM S. HADAWAY, Jn.

Witnesses:

R. J. DEARBORN, F. GRAVES. 

